Missing Method in PageController

Error: The action activity.html is not defined in controller PageController

Error: Create PageController::activity.html() in file: app/controllers/page_controller.php.

<?php
class PageController extends AppController {

	var $name = 'Page';


	function activity.html() {

	}

}
?>

Notice: If you want to customize this error message, create app/views/errors/missing_action.ctp